Question 1

Which of these is not a component of the pancreatic juice?

Accepted Answer

A)  trypsinogen
B)  chymotrypsinogen
C)  deoxyribonuclease
D)  sodium bicarbonate
E)  enterokinaseF) C) and D)
G) B) and E)

Question 2

This image shows tissue layers of the digestive tract.What does "2" represent?

Accepted Answer

A)  lumen
B)  muscularis externa
C)  submucosa
D)  mucosa (mucous membrane) 
E)  serosa (mesentery) F) A) and B)
G) C) and E)

Question 3

Of the following components of bile, only has/have a digestive function.

Accepted Answer

A)  bile salts
B)  bilirubin
C)  cholesterol
D)  phospholipids
E)  neutral fatsF) A) and B)
G) A) and C)

Question 4

Gastric juice consists entirely of water and hydrochloric acid.

Accepted Answer

A) True 
 B)False

Question 5

Bacteria constitute about % of the dry weight of the feces.

Accepted Answer

A)  2
B)  14
C)  30
D)  55
E)  80F) A) and B)
G) A) and E)

Question 6

From superficial to deep, these are the structures found in a typical tooth.

Accepted Answer

A)  cementum, root canal, enamel
B)  enamel, root canal, dentin
C)  dentin, enamel, cementum
D)  enamel, dentin, pulp
E)  crown, enamel, dentinF) A) and E)
G) B) and D)

Question 7

Lecithin prepares fats for hydrolysis by forming

Accepted Answer

A)  triglycerides, fatty acids, and glycerol.
B)  low density lipoproteins (LDL) .
C)  chylomicrons.
D)  emulsification droplets.
E)  micelles.F) B) and C)
G) A) and E)

Question 8

break(s)  down .

Accepted Answer

A)  Lactase; glucose
B)  Peptidases; proteins
C)  Lipases; micelles
D)  Lactose; lactase
E)  Nucleases; nucleotidesF) B) and C)
G) None of the above

Question 9

Which of these nutrients is absorbed by the lacteals of the small intestine?

Accepted Answer

A)  triglycerides
B)  amino acids
C)  glucose
D)  minerals
E)  water-soluble vitaminsF) None of the above
G) C) and D)

Question 10

The enteric nervous system regulates much of the digestive activity but its action depends on the
central nervous system.

Accepted Answer

A) True 
 B)False

Question 11

A hepatic (portal)  triad consists of

Accepted Answer

A)  right, left, and common hepatic ducts.
B)  common hepatic duct, cystic duct, and bile duct.
C)  the hepatic portal vein and two hepatic ducts.
D)  bile ductule, branch of hepatic artery, and branch of hepatic portal vein.
E)  a central vein, hepatic lobule, and hepatic sinusoid.F) A) and C)
G) D) and E)

Question 12

Amino acids and monosaccharides are absorbed in the , and fatty acids are absorbed in the .

Accepted Answer

A)  small intestine; large intestine
B)  small intestine; liver
C)  stomach; small intestine
D)  stomach; large intestine
E)  small intestine; small intestine tooF) B) and C)
G) A) and B)

Question 13

These nutrients are all absorbed without being digested except

Accepted Answer

A)  water.
B)  vitamins.
C)  proteins.
D)  minerals.
E)  cholesterol.F) C) and D)
G) A) and B)

Question 14

Pepsinogen is produced by and is activated by .

Accepted Answer

A)  chief cells; carbonic anhydrase (CAH)  secreted by parietal cells
B)  chief cells; hydrochloric acid (HCl)  secreted by parietal cells
C)  parietal cells; hydrochloric acid (HCl)  secreted by chief cells
D)  parietal cells; carbonic anhydrase (CAH)  secreted by chief cells
E)  enteroendocrine cells; carbonic anhydrase (CAH)  secreted by parietal cellsF) A) and E)
G) A) and D)

Question 15

Which of these is the site of contact digestion?

Accepted Answer

A)  gastric pits
B)  surface of the gastric mucosa
C)  intestinal crypts
D)  brush border of the small intestine
E)  cytoplasm in the cells of the small intestineF) A) and E)
G) All of the above

Question 16

Chylomicrons are secreted from the basal surface of the absorptive cells and taken into the lacteal in
the villus.

Accepted Answer

A) True 
 B)False

Question 17

is associated with food stretching the stomach and activating myenteric and vagovagal reflexes, which in turn stimulate gastric secretions.

Accepted Answer

A)  The cephalic phase
B)  The gastric phase
C)  The intestinal phase
D)  The gastrointestinal phase
E)  The mesenteric phaseF) D) and E)
G) C) and E)

Question 18

The swallowing center is located in

Accepted Answer

A)  the mouth.
B)  the oropharynx.
C)  the esophagus.
D)  the medulla oblongata.
E)  the enteric nervous system.F) A) and D)
G) A) and C)

Question 19

is the physiological process that moves a nutrient from the outside to the inside of the body.

Accepted Answer

A)  Ingestion
B)  Compaction
C)  Digestion
D)  Absorption
E)  SecretionF) B) and E)
G) All of the above

Question 20

Pancreatic enzymes are secreted in response to the hormone

Accepted Answer

A)  insulin.
B)  cholecystokinin (CCK) .
C)  secretin.
D)  glucagon.
E)  gastrin.F) C) and D)
G) None of the above

Exam 25: The Digestive System

From superficial to deep, these are the structures found in a typical tooth.

Correct AnswerverifiedShow Answer

Which of these nutrients is absorbed by the lacteals of the small intestine?

Correct AnswerverifiedShow Answer

A hepatic (portal) triad consists of

Correct AnswerverifiedShow Answer

Lecithin prepares fats for hydrolysis by forming

Correct AnswerverifiedShow Answer

Which of these is the site of contact digestion?

Correct AnswerverifiedShow Answer

The swallowing center is located in

Correct AnswerverifiedShow Answer

is the physiological process that moves a nutrient from the outside to the inside of the body.

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Of the following components of bile, only has/have a digestive function.

Correct AnswerverifiedShow Answer

Bacteria constitute about % of the dry weight of the feces.

Correct AnswerverifiedShow Answer

Chylomicrons are secreted from the basal surface of the absorptive cells and taken into the lacteal in the villus.

Correct AnswerverifiedShow Answer

These nutrients are all absorbed without being digested except

Correct AnswerverifiedShow Answer

is associated with food stretching the stomach and activating myenteric and vagovagal reflexes, which in turn stimulate gastric secretions.

Correct AnswerverifiedShow Answer

break(s) down .

Correct AnswerverifiedShow Answer

Pancreatic enzymes are secreted in response to the hormone

Correct AnswerverifiedShow Answer

Pepsinogen is produced by and is activated by .

Correct AnswerverifiedShow Answer

The enteric nervous system regulates much of the digestive activity but its action depends on the central nervous system.

Correct AnswerverifiedShow Answer

This image shows tissue layers of the digestive tract.What does "2" represent?

Correct AnswerverifiedShow Answer

Amino acids and monosaccharides are absorbed in the , and fatty acids are absorbed in the .

Correct AnswerverifiedShow Answer

Which of these is not a component of the pancreatic juice?

Correct AnswerverifiedShow Answer

Gastric juice consists entirely of water and hydrochloric acid.

Correct AnswerverifiedShow Answer

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